Insole rib stripping



Aug. l2, 1958 c. c. sTRlcKLAND 2,847,339

INsoLE RIB STRIPPING Filed Nov. 3, 1955 le .2 #A

lo Fig, 4

Fig. 3 INVENToR.

United States Faremo 2,841,339 INsoLE vRn; srRrPPING Conrad C. Strickland, Richmond, Va., assignor to Prime Manufacturing Company, Lynn, Mass., a corporation of Massachusetts Application November 3, 1955, Serial No. 544,77'6 2 claims. (Cl. 154-535) rl`his invention relates to preformed rib stripping for attachment to insoles in making welt shoes. It comprises ribbing of new and improved construction advantageous for manufacturing at low cost and distribu- -tion in coil form as well as convenient for rapid and accurate handling by rib applying machinery now available to the industry.

Rib applying machines of two types are at present in use. One type is organized to handle the component parts of the ribbing as they are drawn from separate sources and to combine or assemble the components on their way to the point of application to the insole. The other type of machine is o-rganized to receive the ribbing in preformed condition so that the machine has only to shape properly the attaching flanges of the ribbing and secure them to the sole. The ribbing of the present invention is designed to `be applied by machines of the latter type in accordance with the well-known Prime Process.

Insole ri-bbing heretofore available to the shoemaking industry has been open to criticism in two respects. It has not always run freely from the coil package in which it is most conveniently distributed. This has ybeen because of blocking or the adherence of one turn of the stripping or a part thereof to an underlying turn as sometimes occurs in hot weather or when the coil package has been subjected to rough handling. The second criticism is that in cases where it becomes necessary to strip from the rib a welt improperly sewn, the rib has been found to be so mutilated by the previous operations of stitching and forcible removal that the rib has become torn and impaired in structure so that it will not stand rewelting. The principal object of the present invention is to supply insole rib stripping `so constructed as to obviate these two disadvantages.

To this end the stripping of my invention comprises a relatively thick core adhesively coated on one surface and provided with a textile fabric covering its other surface, together with a tape attached to the coated face of the core and longitudinally folded so as to expose a tacky area of the core and to extend substantially beyond one edge thereof, presenting an uncoated surface facing in the same direction as the fabric ply, and a tacky adhesively coated surface facing in the same direction as the coated tacky surface of the core. It has been found that the fabric ply protects and safeguards the core component of the ribbing so that it is not torn or mutilated by having a welt stitched to it in forming the inseam and then forcibly removed as is sometimes necessary if the welting operation is not accurately performed. The fabric covering also forms a surface to which the tacky side of the ribbing will not adhere when -the ribbing is wound upon a spool or in superposed turns. Consequently all danger of blocking is obviated and the stripping can be counted upon always to run freely from the coil to the applying machine.

These and other features of the invention will be best understood and appreciated from the following descripright angles into an inner attaching flange.

Ice

ving steps byv which `the rib stripping is-made up, Vand showing it also in'its completed form,

Fig. 2 is a fragmentary View in cross-section of the rib stripping in coiled form,

Fig. 3 is a fragmentary view `showing a portion of the stripping as applied to an insole, and

Fig. 4 is a cross-sectional viewon an enlarged scale..

As best shown in Fig. 1 the components of the stripping comprise a relatively thick, tough strip or core 10 of fabric or other rm exible material of a fibrous nature. It is uniform throughout in width and thickness except that it may be symmetrically and longitudinally scored by a shallow groove 11 which thus provides a break line for this component of the stripping when the latter is given its right angular cross-sectional form in attaching the strip to an insole. The scored face of the core 10 is now provided with a textile fabric ply 12 which completely covers the surface of the core and is adhesively attached thereto. Any tough, loosely woven fabric such as tobacco cloth, Osnaburg or crinoline is suitable for this purpose. entrant contour of the groove 11 in the core.

With the covered core 10 is now combined a wider tape 13 coated on its face 14 with a tacky solvent activatable adhesive such as a solution or dispersion of natural or synthetic rubber latex of pressure-sensitive nature. The tape is permanently and adhesively secured to the face of the core 10 throughout approximately onehalf its width and is folded or doubled upon itself along the line 15 so that it'extends as shown in Fig. 4 upwardly above the upper edge of the core 10 and with its adhesive coated face directed in the opposite direction from the fabric coated face of the core. The surface 16 of the core which is exposed beneath the fold line 15 is coated with the same adhesive compound as the face 14 of the tape. The ribbed stripping thus described and shown at the right side of Fig. 1 and in Fig. 4 is the material which it is desired to supply to the shoe manufacturer for use in his rib applying machine.

The stripping prepared as above explained is most conveniently packaged for distribution by being coiled upon a spool or sleeve 20 of cardboard or the like as suggested in Fig. 2. The stripping is wound with the tacky adhesive-coated face 14 of the tape and the exposed tacky face of the core in contact with the flexible fabric ply 12 and the uncoated surface of the tape of each underlying turn. It has been found that these tacky faces adhere very lightly to the fabric 12 and that the stripping will thereforerelease itself and run freely from the coil as it is drawn by the instrumentalities of the rib laying machine -to the point of application upon the insole.

The ribbing as shown in Fig. 3 is attached by bending the core to form an outwardly disposed flange with its exposed adhesive-coated face adhesively attached to the insole 21 and the fabric ply correspondingly conformed. The bend in the core at the break line determined bythe groove 11 is located opposite the fold line 15 of the tape 13 and the coated tacky surface of the tape is 'bent at It will be understood that the components of the ribbing are progressively conformed in-to the attached shape shown in Fig. 3 as the stripping is fed to the point of application. While the rib is shown as disposed substantially perpendicular to the insole surface in Fig. 3, it is often desirable to impartan inward inclination -to the upstanding portion of the rib.

The cemented textile fabric 12 is moisture resistant and also highly reinforcing in the sewing rib. The mois- The fabric is shown as following the re- 3' c ture resistant characteristic is of great importance in the manufacture of shoes in which steam or moisture softened box toes are employed because if not so protected the fibrous body of the rib or core will be softened and rendered punky at that stage and so `become liable to tearing in the subsequent Welt sewing operation. The reinforcing characteristic is `also valuable in providing greater structural strength in the rib and particularly greater tensile strength in its outer portion by multi-ply effect.

Having thus disclosed my invention and described an illustrative embodiment thereof in detail, I claim as new and 'desire to secure by Letters Patent:

l. Insole rib stripping of the class described comprising a relatively thick core coated with tacky adhesive on one surface, a ply of moisture-resistant reinforcing fabric covering the entire other surface of the core, and a tape attached to the coated face of the core, the tape being folded on itself on a fold line exposing approximately 4 half of the coated and tacky surface `of the core for direct attachment to an insole and extending substantially beyond one edge of the core, presenting an uncoated surface facing in the saine direction as the fabric ply, and a tacky adhesive-coated surface facing in the same direction as the coated surface of the core.

2. Insole rib stripping of the character dened in claim 1 in which the core is provided with a longitudinal groove beneath the covering ply of textile fabric and located substantially opposite to the fold vertex of the tape.

References Cited in the file of this patent UNITED STATES PATENTS 2,736,675 Pehrson Feb. 28, 1956 2,774,699 Clark Dec. 18, 1956 FOREIGN PATENTS 712,381 Great Britain July 21, l1954 

1. INSOLE RIB STRIPPNG OF THE CLASS DESCRIBED COMPRISING A RELATIVELY THICK CORE COATED WITH TACKY ADHESIVE ON ONE SURFACE, A PLY OF MOISTURE-RESISTANT REINFORCING FABRIC COVERING THE ENTIRE OTHER SURFACE OF THE CORE, AND A TAPE ATTACHED TO THE COATED FACE OF THE CORE, THE TAPE BEING FOLDED ON ITSELF ON A FOLD LINE EXPOSING APPROXIMATELY HALF OF THE COATED AND TACKY SURFACE OF THE CORE FOR DIRECT ATTACHMENT TO A INSOLE AND EXTENDING SUPSTANTIALLY BEYOND ONE EDGE OF THE CORE, PRESENTING AN UNCOATED SURFACE FACING IN THE SAME DIRECTION AS THE FABRIC PLY, AND A TACKY ADHESIVE-COATED SURFACE FACING IN THE SAME DIRECTION AS THE COATED SURFACE OF THE CORE. 